The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 09, 1985
Filed:
Jun. 07, 1982
Jan Rajchman, Princeton, NJ (US);
Other;
Abstract
An electronic apparatus is used to measure distance by the detection and counting of a train of hot spots. The apparatus essentially comprises a heat producing means, a hot spot detecting means and electronic circuitry for energizing the heat producing means in response to the detection of a hot spot by the hot spot detecting means, whereby a train of hot pulses is produced that are spaced by the distance L between the heat producing and hot spot detecting means. A counter is used to record the number of hot spots detected by the hot spot detecting means. As the apparatus is moved, the device measures distance in increments of the separation L. An alternative embodiment is disclosed that produces two hot spots simultaneously and uses a single hot spot detecting means. The apparatus is preferably employed as part of the position reckoning means in a microcopier. However, other applications such as measuring the distance on maps, are also possible.